Machine for applying coatings



A. E. JOHNSON. MACHINE Foa APPLYlNG CoATlNGs.

APPLICATION FILED DEC.26, 1918.

3 SHEETS-SHEET I.

Patented Mar. 28, 1922.

A. E. JOHNSON. MACHINE Foa APPLYING commes.

APPLICATION. ElLED DEC. 26, 19H3.

Patented Mar. 28, 1922.

EETS-SHEET 2.

A. E. JOHNSON.

MACHINE FOR APPLYING COATINGS. APPLICATION FILED 05026. I9Is.

73 /A/ VEA/7m?.

Patented Mar. 28, 1922.

3 SHEETS-SHEET 3.

onirica ALBERT E. JOHNSON, F BEVERLY, MASSACHUSETTS, ASSIGNOB, T0 UNITEDSHOE MACHINERY CORPORATEON, OF PTERSON, NEW' JERSEY, A CORPORATION 0FNEW JERSEY.

ralenti.

Application led December 26, 19153.

To all 107mm t may courant.' i Be it known that l, Lamar E. JOHNSON, acitizen of the,l United States, residing at Beverly, in the countyoititssex and State ot Massachusetts, have invented certain lnprovementsin Machines for Applying Coatings, ot' which the following description,in connection with the accompanying drawings, is a specification, likereference characters on the drawings indicating like, parts in theseir'yeral figures ihrs invention relates to machines tor applyingcoatings such as liquid coloring materials to boots and shoes. Aparticular object ot the invention is to provide a machine suitable toruse in applying coatings to the edge surfaces ot soles and heels afterthey have been incorporatedin shoes in the process ot' shoe manufacture,but it will be apparent -trom a consideration ot the constructionhereinafter described that the invention is not thus restricted in itsapplication and that a machine embodying novel features of the inventionis susceptible of a variety ot uses.

ln linishing operations on some types oit shoes, a very quickly dryingenamel or paint is used to'cover and beautify the edges or" the sole andheel ot a shoe. This enamel or paint is usually applied-by the aid ot abrush `which is `lirst dipped into the paint and then carried totheedges of the sole and heel, theoperative holding the shoe in one handand the brush in the other. YIt will be aparent that as thus carried outthe operation is slow and the resulto are far tromunitorm, since, torexample, the width ot the edge suriace varies and a larger quantityotthe paint is likely to he applied to some portions ot the sui-tace thanto others. Furthermore, the paint dries so quickly that any overlappingor' the strokes ot the brush is apt to vmar the appearance ot theiinhhed surtace.

lt is an important object ot the present invention'to provide machineorganized to apply various kinds ot coatings, such as blackings` paints.and quick drying enamelsVA to the el i-s ot the soles lheels otlcornpleted shoes. so as to impr te the quality ot 'il increase thequantity ot perform in a p or col Specification of Letters Patent.

Serial No. 268,356.

proved means for determining the position ot the work relative to thespraying nozzle.

il. teature et marked importance consists in the construction andarrangement by which the amount of spray delivered to the work iscontrolled by the work itself so that as variations in certaincharacteristics of the work occur the .spray is automatically regulatedvin accordance therewith.

ln another aspect, the invention comprises an organization in which workengaging or measuring means associated with the spray nozzle isoperative to control the nozzle in accordance with characteristics suchas dimensions ot the work presented for the spraying operation;

Other features ot the construction are designed particularly to admit ofrapid and effective removal ot the spray material from the nozzle andits supplying conduit whenever work is to be discontinued tor aconsiderable period ol time as, for instance, at the end of the workingday. rlhis is ot no little importance since some of the enamels dry soquickly that it not removed etlectivelv at the propertime they arelikely to occlude the passageways ot conduit and nozzle.

@ther objects and features ot the invention will be apparent from thefollowing detailed description and will be pointed out in the claims.

in tire oiawings,

Fig. is side elvation of a spraying machinerepresenting one embodimentot my invention rio'. 2 is section through the nozzle 3 mecha ism o themachine along the line 2-2 ot Fie 2 is a similar view to that ot Fig. 2showing the parts slightly enlarged and in a dillerent position relativeto each other 'trom that which they occupy in Fig. 2;

5l is a trontview ot the machine shown in Fig. i;

4 is view ot the trent portion ot the machine illustrating a slightmodification:

5 is a detail view showing a slide tor a part ot the conduit;

"ii. 6 is a detail view along` the line l, and

l' is a detail view in perspective ot the uositioning means shown inside view illustrative machine, there is proa i; ik or receptacle 8 lorthe blacku other spray material, bracket l!) extending from the frame l2being provided as a suitable support for the receptacle. Mounted inbrackets l0 and 14 is a vertical shaft 16 which is suitably journaled inthe bottom of the receiver to project therethrough and operate a stirrer18 having the function of keeping the liquid contents of the receptacleofl uniform consistency. .Vertical shaft 16 may be driven by anysuitable means, that shown in the present construction comprising` bevelgears 2O and 22 operatively connecting the shai't 16 with a horizontalshaft 24 carrying a pulley 26 arranged to be driven from any suitablesource of power. Connecting the receptacle 8 with the nozzle 28 is apipe or conduit comprising preferably a relatively movable portion 30and a stationary portion 32, the latter being supported at each end by awasher-like structure 33 having a cross-bar 35 (Fig. 6) and opening at34 into the fluid chamber 36 oit the nozzle. As shown. the movable Ypart 30 of the pipe or conduit'for the liquid extends well down into thereceptacle 8 to a point just above the stirrer. Surrounding the conduitthroughout the middle portion thereof is a hollow structure 38 having apassageway 40 for compressed air which is admitted through the pipe 42,the latter being connected to a reservoir 44 for compressed air whichmay be supplied according to any of the well-known methods. The supplyof' air for the spraying operations is controlled by a valve 460i"- anyordinary construction located in the portion 48 ot the pipe 42, the saidvalve being controlled by means under the control of the operatorcomprising, in the'construction shown, a link 50 attached to the valveat one end and at its other end to a second link 52 having its lower endattached at 54 to a lever 56 pivoted at 58 to the frame of the machineand arranged to be operated from a treadle (not shown) by means of aconnecting rod 60. Removably attached to the hollow structure 38 at thefront part 'thereof is the nozzle structure 28 which is constructed asshown most clearly in Fig. 2 to provide passageways for the fluid andother passageways for the air which serves to force the fluid from thenozzle under pressure. yIhe upper portion of the nozzle structure ispreferably in the form of a hollow castingl 62 having side walls 64 towhich are attached by screws'or other suitable astening means the thinside plate 66 arranged to converge downwardly to the outlet oi thenozzle, the side plate 66 being continuous around the end portions ofthe nozzle and being held in place by end plates 68- and 70. 4Since theside plates 66 are relatively thin and flexible a member 7 2 is providedfor engaging the lower edges of the same throughout their lengths, thesaid member being secured detachably by a fastening at 74 at one endthereof and by screw threaded fastenings 76 at its other' end. Thismember 72 constitutes the real outlet of' the nozzle,the size of whichis controlled by a slide 7 8 in a manner to be hereinafter described.Inside of the casting 62 there is positioned a smaller similarly shapedmember 80 constituting in effect a flaring continuation of the conduit32, the two being joined as heretofore pointed out to communicate witheach other at the point 34. The sides and ends or' the member 80 havesecured thereto throughout the continuous lower edge thereof arelatively thin flexible extension 82 with downwardly converging sidesextending at the lower ends thereof' almost into the plane of the loweredges or' the sides 66. Inside of the member 8O is a long wedge shapedmember 84 shown in cross section in Fig. 2 and having the function ofcontrolling the amount of fluid which can pass from the fluid chamber36. In order to adjust the member 84, there is provided a link 86securely attached thereto by a pin 88 and having at its upper end ascrew threaded portion designed to be engaged by a correspondinglythreaded nut 90 which is screw threaded into an opening in the upperpart of the casting 62. Upon turning the nut 90, the link 86 and with itthe wedge 84 are adjusted in a vertical direction toward and from theoutlet of the nozzle, and because of the difference in pitch of theinteriorly and exteriorly threaded portions ofV the nut the member 84may be adjusted with the required lineness and precision to controlaccurately the amount of liquid at the outlet of the nozzle. Vhereas inFig. 2 the parts are so adjusted asto sluit off the air and the fluid attheoutlet of the nozzle, the showing ot Fig. 2a is such thatthese sameparts are shown so disposed as to permit air to pass along thepassageways 92 and fluid along the passageways 94 from the fluid chamber36. In this connection it should be pointed out that the air passageway49, which surrounds the stationary part 32 of the conduit for the spraymaterial and also the upper portion of Y the movable part 30 of theconduit, communicates at one end with the receptacle 8 and at its otherend, indicated at 93, with the air chamber 95 in the nozzle.

In order to position the work properly at the outlet of the spray nozzlethere is provided a member 96 in the forni oir a rotatablv mounted diskcarried by an'arm 98 detachably secured to one end of the nozzlestructure 28. This disk is designed to enter the rand crease or" theshoe as indicated by dotted lines in Figs. l and 4 to operate as a gagefor the work and to serve also as a shield to'prevent application or"the liquid to portions of the shoe above the heel or sole edges.Preferably, a work rest 100 is also provided against which the treadsurface of the heel is placed and which co-operates with the disk member96 in positioning the Work. This Work rest comprises, in addition to theplate 102, which engages the tread surface of the heel, a plate 104hinged for limited movement to one edge of the plate 102 and pressedupon by a spring actuated member 106 'to cause the plate 104 to engagethe breast surfaces of heels formed at various angles With respect tothe tread surfaces thereof. Attached to plate 102 is a block 108 havingsecured thereto cleats 110 provided With -beveled edges 112 arranged toengage correspondingly beveled edges on a support 114, the arrangementproviding for sliding movement of the -Work rest 100 on the support-ingmember 114, a pin 116 being arranged to engage another pin 118 to limitthe movement of the Work rest on said supporting member. vPreferably,the supporting member 114 is pivotally mounted for limited movement in aslot in the end of the shaft 120, said shaft being rotatably andslidably mounted ina bearing 122 on the frame of a machine. In order tohold the shaft 120'projected toward the right in Fig. 1 in a position topresent the work rest in a location adjacent to the disk member 96 thereis provided la spring 124 mounted at one end-in the bossV 126 on theframe of the machine and arranged to engage with its other end the endsurface V128 of the shaft 120, a collar 130 being adjustably secured tothe shaft to' determine the extentof projection of the shaft toward theright in Fig. 1, Mounted upon a stud 182 is an arm 184 havingasegmentalrack 136 at its upper end arranged in Yconstant mesh with a gea-r 188secured to shaft 120 by means vof the ordinary key and slot connectionto Vpermit of the sliding movement of said shaft as above described.Selectively engaged in any one of a plurality of openings 140 in the arm134 is one end of a coiled spring 142 so arranged as to tend constantlyVto return said arm to a position of rest in which a stop 144 carried-thereby engages With a portion of the machine frame 12. The operationof this part vof the Ymechanism may be briefly statedV as follows:

A shoe positioned for the spraying operations is so arranged that thedisk member 96 engages in the rand crease above the heel While at thesame time the tread surface of the heel engages the plate 102 of theWork rest 100,-the work rest being so arranged in connection with itssupporting shaft 120 that the loivest heel will be pressed more or lessfirmly against the member 96 by the action of the spring 124. At thebeginning of the spraying operation, a'heel engaged with its breastportion against the plate 104 is positioned with one breast edge thereofsubstantially in line with the outlet ofthe nozzle. The heel Will thenbe turned at a regular rate so as to presentthe entire curved sur- Withthe rotation of the Work rest 100 and its supporting shaft 120, the arm134 is swung about the stud 132 against the action of the spring 142which operates upon removal of the Work to return the shaft 120 and theWork rest carried thereby back to initial position in so far as rotationof the shaft can effect that result, it being understood that the Workrest and especially the plate 100 is not necessarily brought back toinitial position determined lby the proper amount of relative slidingmovement of the plate 100 and its supporting member 114, relativemovement of these parts being variable Within limits determinable asheretofore pointed out by engagement of the pins 116 and 118.

In connection with the Work rest, its supporting shaft 120 and thespring 124 Which constantly urges the shaft and Work rest to the limitof their movement in one direction and toward the relatively stationarymember 96, it is pointed out that these parts constitute in effect aWork measuring mechanism automatically adjustable to various sizes ofheels and to the varying height of each individual heel during rotationthereof beneath the spraying nozzle. In connection With the Work restand With the described Work measuring mechanism there is provided ameans for controlling and regulating the spray with respect to therequirements of the Work. In the present embodiment of the invention,the controlling means for the nozzle comprises a member or slide 78operated to effect constantly the most precise adjustments thereof bymeans associated With the measurinfr means for the Work and consistingpreferably of a cam member 146 mounted fixedly on the shaft 120 andarranged to engage rotatably in a slot 148 in a block 150 attached toanintermediate portion of the member 78. The arrangement is such thatmovements of the Work rest 100 toward Vand from the guiding member orabutment 96 is accompanied by corresponding movements of the member l78,slidable in a bracket 151 and in nozzle 28` not only during theinsertion of heels of different dimensions but also during movements ofthe Work rest relatively to the member 96 while each individual heel isbeing turned to provide for the spraying of the curved surface thereof.The member 78 thus regulates the Width of the spray in exact accordanceWith the height of the curved surface of the heel as the said heelvaries in height in passing from one breast edge of the heel around tothe other breast edge. It will be apparent, then, from the describedconstrucshoe vin proper position against the work positioning members 96and 10G to turn the same during the spraying operation, since the sprayis automatically regulated to the requirements of the work by the meansde- At the end of tl e days work it is important that the spray nozzleand the conduit leading thereto should be cleared of the spray materialwhich otherwise might harden in the passageways and nally causeocclusion oli the same. 1n order to elleet this operation the conduithas been made in relatively movable sections and the nozzle parts havealso been constructed and arranged for movement relatively to each otherto assist in the removal of the spray material from the nozzle by meansof the compressed air supply. According to the preferred construction,the movable portion 30 of the conduit is carried by a slide 156 mountedand normally held tightly between projecting portions 158 of the hollowtubular structure 38. As shown most clearly in Figs. 1 and 5, the slideextends across the passageway 4() for the compressed air and normallyholds the movable conduit 30 centrally wit-h respect to said air passageand in communication with the stationary part 32 oi the conduit. Byloosening the tightening screws extending between the projections 158the slide 156 may readily be displaced to the left in Fig. 5, thusmoving the movable portion 30 of the conduit out of alinement with thestationary portion 32 and bringing an opening 160 in the cross bar 162of the slide op Y posite the end of the stationary portion 32 ol theconduit so that air under pressure may enter thn conduit and passingtherealong remove the fluid there-from and also from the iluid chamber36 and the passageways 94 of the nozzle, thus ellecting a completeremoval of the fluid from these parts. 1n order to make the air pressuregreater and more effective, the construction of the nozzle is such as`to permit the cutting otl of the air outlet of the nozzle, this beingaccomplished by lowering the member 80, 82 so that the lower convergingedges of the latter will completely close the air passages 92 asdisclosed in Fig. 2 of the drawings,

' lowering of the member 80, 82 being effected by the propermanipulation ot the set screws 164. 166. Thus with the air outlet closedin the nozzle the air under pressure must find its way through thestationary conduit 32 an(L the expanded flaring` end thereoi whichconstitutes the chamber 36 in the noz- -zle and linally along thepassageways 94,

166 and'irmly secured therein by the cooperation of the two set screwmembers 164, 166 after which the slide 156 will be returned` to itsnormal position, re-alining the movable and stationaryV portions of theconduit, thus placing the machine in condition for use in sprayingoperations. Obviously, adjustment of the member 80, 82 may be utilizedto vary the size .of the air passages 92 in the nozzle in accordancewith the requirements oi' the work. A

Ina modification of Ahe invention shown in 4, the spray nozzle 28a ismuch lesscned in width in comparison with thenozzle disclosed in Fig. 1,since the nozzle or' the modification is intended to operate upon theedge of the sole, and is adapted for ready substitution for nozzle 28 onthe head of the machine. An accompanying change consists in thesubstitutionv ofanother form of work rest designed to engage the bot-tomor the sole and shown as comprising a roll 170 mounted rotatably von asupport 172 pivotally mounted at 173in the shaft 120 and designed to bequickly substituted for the work rest 100 and its support 114 made useof in operating on the heels oi shoes. In addition to the roll 170 thereis mounted on the member 172 a combined shield and edge Vguide 174.Otherwise the construction and mode of' operation of the device is thesame as that of the machine already described, regulation of the spraybeing effect ed through the controlV of the sliding member 7 8 by meansof the work contacting roll 170 as will be obvious from the foregoingde# scription and from an inspection of Fig. 4.

1n operatingv the machine, the operator places a shoe with therand'crease thereof engaged with the member 96 and with either the workrest 10() or the roller 170 engaging the tread surface of the heel or ofthe sole, as the case may be, and then depresses the treadle to open theair valve 46 to permitof the inllow of air under pressure, thus forcingthe spray material from the nozzle on to the work while the same isbeing turned toV bring the various portions thereoi1 in line with thespray, and finally releases the treadle and removes the shoe at the endof the spraying operation, vautomatic. control of the spray inaccordance with the require ments of the work making it necessary onlythat the operator maintain the shoe inv con-V tact with the workpositioning means and turn and otherwise move the shoe at the raterequired to obtain the best results.

Having describedV my invention, what 1 claim as new and desire to secureby Letters Patent of the United States is:

1. 1n a machine of the class described, a spray nozzle, and means forejecting spray from said nozzle constructed and arranged to becontrolled by varying characteristics of the work in its' presentationto the machine.

2. 'In a machine of the class described, a

.spray nozzle, and means controlled in accordance With varyingdimensions ot the Work for determining the amount of spray ejectedfromsaid nozzle.

3. In a. machine of the class described, a spray nozzle,a Worlr rest forpositioning the work with respect to the nozzle, and means controlled bymovement of the Work rest for determining the. Width of the spray fromthe nozzle.

4. In a machine ot the class described, a spray nozzle, and means 'forregulating automatically the dimensions of the jet of spray ejected fromsaid nozzle.

5. In a machine of the class described, a spray no-zzle, a Work rest forpositioning the Work With respect to the nozzle, and means controlledautomatically from the Work rest for regulating the spray from thenozzle.

6. In a machine of the class described, a spray nozzle, a member forengaging in the rand crease of a shoe, a member for engaging anotherportion of the shoe, and means for regulating the spray from said nozzleconst-ructed and arranged to be controlled by relative movement ot saidmembers.

7. In a machine of the class described, a spray nozzle, a member forengaging in the rand crease of a shoe, a movable member for engaginganother portion of the shoe to measure variations in certain structuralcharacteristics of the shoe, and means controlled by said measuringmeans to regulate the spray from the nozzle.

8. In a spraying machine, a spray nozzle, means for measuring the Workto which the sprayed material is to be applied, and means controlled bysaid measuring means for regulating the spray from the nozzle.

9. In a spraying machine, a spray nozzle, means for automaticallymeasuring the Work to which the sprayed material is to be applied, andmeans controlled by said measuring Vmeans for adjusting the size of theoutlet of the nozzle.

10. In a spraying machine, a spray nozzle. a member adapted to engage inthe rand crease of a shoe to position the shoe and limit the applicationof spray thereto, and a. member for engaging another portion of the shoefor controlling automatically the Width of the spray from said nozzle.

11. In a spraying machine, a spray nozzle, a Work rest mounted forrotation so as to present all portions of the 'Work to the nozzle. andmeans for returning the rest to initial position. i

12. In a spraying machine, a spray nozzle, an abutment for engaging ashoe to position the same properly With respect to the nozzle, and awork rest mounted for movement in a plurality of directions and alongdifferent paths so that all portions of the Work may be presented to thenozzle.

13. In a spraying machine, a spray nozzle, a Work rest mounted forrotation so as to present all portions ot the work to the nozzle, meansfor returning the rest to initial position, and means for automaticallyadjusting the Work rest to variations in the Work during rotationthereof.v

14. In a machine of the class described, a spray nozzle, a Work restagainst which a shoe is pressed, the position of which is controlled bythe shoe during presentation thereof to the nozzle, and means associatedwith the Work rest for cont-rolling the spray from the nozzle.

15. In a spraying machine, a` spray nozzle, ,means -for measuring theWork upon presenting the same in proper position to receive spray fromthe nozzle and constructed and arranged to move with the Work as thelatter is turned to present the various portions thereof to the spray,and means controlled by said measuring means tor determining the size ofthe outlet of the nozzle.

16. In a spraying machine, a spray nozzle, a rotatable rand crease guidefor positioning the shoe with respect to the nozzle, and a Work rest forengaging another portion ot the shoe and mounted both slidably androtatably so that various portions of the shoe may be presented to thespray from said nozzle. v

17. In a spraying machine, a spray nozzle,

a guide for the shoe Vto position the same properly withrespect to thenozzle and constructed to shield portions of the shoe against the spray,and a Work rest mounted for movement in a plurality ot directions andalong different paths so that various portions of the Work may bepresented to the nozzle. l

18. In a spraying machine, a. spray nozzle, means for measuring the workupon presentation ot the same in proper position to receive spray fromthe nozzle and constructed and arranged to move with the Work as thelatter is turned to present the various portions thereof to the spray,and a member movable across the outlet of the nozzle and controlled bysaid measuring means for determining the size of the outlet of thenozzle.

19. In a spraying machine for shoes, a spray nozzle, a rotatable shieldJfor limiting the, application of spray to a shoe, and a Work rest forengaging another portion ot the shoe and mounted both slidabl-y androtatably so that all portions of the edge of the shoemay be presentedto the spray from said nozzle.

20. In a spraying machine, a spray nozzle, a container for the spraymaterial, means for forcing the spray material under pressure from thecontainer and through the nozzle comprising a pipe for air underpressure, a valve in said pipeunder the control of the operator, andindependent means for controlling at the nozzle the delivery of spray.

2l. ln a spraying machine, a spray nozzle, a container for the spraymaterial, means for forcing the spray material. under pressure from thecontainer and through the nozzle comprising a pipe lor air underpressure, a valve in said pipe under the control of the Operator, andWork-controlled means for controlling at the nozzle the delivery ol.

spray. i p

2Q. In a spraying machine, a spray nozzle, a container for the spraymaterial, means for forcing` the spray material under pressure from thecontainer and through the nozzle comprising a pipe for air underpressure, a valve in said pipe under the control ott the operator, andmeans for automatically controlling the delivery of spray from thenozzle.

ln a spraying machine, a spray nozzle, a reservoir for the spraymaterial, a conduit tor the spray material leading from the reservoir tothe nozzle, a passageway for air under pressure communicating' with saidreservoir and with the nozzle to force the spray material from thereservoir through the lconduit and from the nozzle, and Work controlledmeans for determining the size of the outlet of said nozzle.

In a spraying machine, a spray nozzle, a reservoir for spray material, aconduit for spraymaterial connecting the reservoir to the nozzle, apassageway for air under pressure communicating with said reservoir andwith said nozzle to torce spray material through said conduit and tromsaid nozzle,

means under the control ot the operator for controlling the air passage,and automatic means for cont-rolling the nozzle opening.

25.` In a spraying machine, a spray nozzle, a reservoir for the spraymaterial, a conduit for the spray material leading trom the reservoir tothe nozzle, a passageway for air under pressure communicatingl with saidreservoir and with the nozzle to lorce the Vspray material from thereservoir through a reservoir for spray material, and a conduitconnecting said reservoir with said nozzle and comprising a stationaryand a movable portion so constructed and arranged as to bedisconnectible without removal from the machine, the constructionandarrangement being suchthat air under pressure may be forced throughthe stationary portion of the conduit to remove the spray materialtherefrom. Y

27.--In a spraying machine, a spray nozzle,

raient/1i a reservoir for spray material, a conduit connecting saidreservoir with said nozzle and comprising a stationary' and a movableportion, a passageway for air under pressure, and means tor'moving themovable portion et the conduit to connect the stationary portion ot theconduit with the air passageway, the construction and arrangement beingsuch that air under pressure may be forced through the stationaryportion of the conf duit to remove the spray material therefrom.

28. In a spraying machine, a spray nozzle, a reservoir for spraymaterial, a conduit connesting said reservoir and said nozzle comprisinga stationary part and a movable part, a passageway for air underpressure surrounding said conduit, and a slide carrying said movablepart and operable to disconnect the movable part from the stationarypart of the conduit and to place said stationary part oi' the conduitVin communication with the air passageway so that the spray material maybe forced from said conduit.

Q9. ln a spraying machine, a spray nozzle, a reservoir for spraymaterial, a passageway for air under pressure, a conduit, connectingsaid reservoir and said nozzle comprising a stationary part and amovable part, and a slide for moving said movable part and operable tedisconnect'the movable part from the stationary part of the conduit andto place said stationary part of thereon-duit in communication With theair passageway soV 'that the spray material may be tor-ced from saidconduit.

30. In a spraying machine, a spray nozzle, a reservoir for the spraymaterial, a conduit connecting the reservoir and the nozzle, apassageway for air under pressure ccmmunicating with said reservoir andysaid nozzle to torce spray material from said reservoir through theconduit and from the nozzle, said conduit comprising relativelystationary and movable portions, a slide ttor carrying saidmovableportion and operable to disconncct'said movable-portion trom thestationary portion and to place the stationary 'tionoif the, conduit incommunication `with the air passage, means for closing the air passageat the delivery endoi the nozzle.

and means under the control of the operative for controlling the passageet air through' said air passage and through the stationary part et the-conduit" to torce the spray material therefrom and from the nozzle.

3l. ln a machine ot the class described, a reservoir 'for liquid, `adelivery device, a conduit connectingthe reservoir and delivery device.a source of Huid pressure, and cornbined liquid-delivery and clearingconnecu tiens included in the conduit Vbetween the reservoir and'sourceand the delivery device. ln testimonyvvhereof l have signed my name tothis specication. Y

ALBERT JOHNSON.;

